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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0461: Fuel Level Sensor >> Overall Function Check >> With GST
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With GST

NOTE: Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 l (7-7/8 US gal, 6-5/8 Imp gal) in advance.
  1. Prepare a fuel container and a spare hose.
  2. Release fuel pressure from fuel line, refer to FUEL PRESSURE RELEASE  .
  3. Remove the fuel feed hose on the fuel level sensor unit.
  4. Connect a spare fuel hose where the fuel feed hose was removed.
  5. Turn ignition switch OFF.
  6. Set voltmeters probe between ECM terminal 119 (fuel level sensor signal) and ground.
    Fig 1: Checking Voltage between ECM terminal 119 & ground
    G00761030Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Turn ignition switch ON.
  8. Check voltage between ECM terminal 119 and ground and note it.
  9. Drain fuel by 30 l (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
  10. Fill fuel into the fuel tank for 30 l (7-7/8 US gal, 6-5/8 Imp gal).
  11. Confirm that the voltage between ECM terminal 119 and ground changes more than 0.03V during step 8 - 10.

    If NG, check component of fuel level sensor, refer to CHECK FUEL LEVEL SENSOR UNIT .

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